Throttle-valve mechanism for automatic-rotation hammer-drills.



A. H. TAYLOR. THROTTLE VALVE MECHANISM FOR AUTOMATIC ROTATION HAMMER DRILLS.

APPLICATION FILED JULY15.1913.

Patented Feb12, 1915.

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H A 12 L 13 I3 24' .12 1a A TTOB/VEV A. H. TAYLOR. THROTTLE VALVE MECHANISM FOR AUTOMATIC ROTATION HAMMER DRILLS.

APPLICATION FILED JULY 15, 1913,

Patented Feb. 2, 1915.

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ALBERT H. TAYLOR, or EASTON, PENNSYLVANIA, AssIoNoR roINGERsQL'L-RAND COMPANY, OF JERSEY CITY, NEW JERSEY. A CORPORATION OF NEW JERSEY.

THROTTLE-VALVE MECHANISM FOR AUTOMATIC-ROTATION HAMMER-DRILLS.

Specification of Letters Patent.

Patented tea a, 1915.

4 Application fiieaiul 15, 1913. seminav'vaeas.

T all whom it may concern:

Be it known that I, ALBERT H. TAYLOR, a citizen of the United States, residing at Easton, in the county of Northampton and State of Pennsylvania, have invented a certain new and useful Improvementin Throttle-Valve Mechanism for Automatic- Rotation Hammer-Drills, of which the following is a specification.

This invention relates to fluid operated hammer drills having an independent motor for rotating the steel and more particularly to valve mechanism for controlling thetluid supply to the hammer cylinder and the rosame time, and also to provide for a variable fiuid supply to the hammer cylinder during the full operation of the rotating motor.

A further object is to provide a valve which cuts off the oil supply from the fluid admission chamber during the non-operation of the drill so that leakage oi the oil is avoided and the oil supply can be renewed withoutdisconn'ecting the fluid supply line.

\Vith these objects in view, I have devised a valve mechanism, a practical embodiment of which is shown in the accompanying drawings in which I Figure 1 is a side elevation of the drill showing the various positions of the -valve handle. Fig. 2 is a longitudinal section through the drill on the line ll -lI of Fig. 1. .Fig. 3 is a transverse section through the valve and oil chamber on the line Ill-III of Fig. 2. Fig.4 is a transverse section through the rotating mechanism on the line IV -IV of Fig. 2. Figs. and 6, 7 and 8, Qand 10,11 and 12 are sections through the throttle valve on lines A-A and 3B-B of Fig. 3 showing the position of the valve operating .POSltlOIl, and second and third operating ,position, respectively.

The drill, as shown, comprises a cylinder 1 in which reciprocates'a piston 2 which strikes on the anvil block 3 resting against drill steel l. The drill steel 4 is rotated through the sleeve 5 by an independent motor 6, here shown of the type described in my previous Patent #998,932, July 25th, 1911, but which may be of any type which rotates the steel independently of the hammer piston action. From the valve chest 7 of this rotating motor, a fluid inlet passage 8 leads to a valve port 9 which opens into one side of a slightly conical valve bore 10 in the head block 11. Rotatably mounted in the valve bore 10 is a throttle valve 12 which is provided with a stem 13 on the outer end of which. is secured a. throttle handle 14. In the opposite face of the valve bore 10 is a cylinder supply port 15 which leads by a is hollow forming with the adjacent portion of the valve bore 10 a supply chamber 18 to which fluid is supplied from the fluid supply (not shown) through an inlet opening 19. Through the valve plug 12 and adapted to supply fluid from the supply chamber 18 to the ports 9 and 15 are admission ports 20 and 21. The port 20,,which normally con} trols thepassa'ge of fluid to the port 9 covers a considerably greater arc than port 21.

In the head block 11 is an oil chamber 22 adapted to be filled from the outside by the removal of screw plug 23. From this oil chamber an oil passage 24 leads to an interior surface of'the valve-bore 10. In the valve plug 12 is a port 25 which registers oil from the chamber 22 to be drawn into the. supply chamber 18. The arrangement of ports in the valve bore and in the valve. plug allows the valve plug to be. placed in four major positions, one non-operating position and three operating positions.-

The first operating position'is shown in Figs. 5 and 6. This position ofthevalve 12 corresponds to the position of the valve with the opening of the passage 24 to allow I which is the non-operating position,'corresponding to the position of the handle shown in solid lines in Fig. 1, no fluid isadmittcd to the, hammer cylinder or the roshowing and description discloses only one tating motor and the oil passage 24 is also closed.

In the second operating position shown in Figs. 9 and 10, and which .is intermediate of the non-operating position andthe third operating pcsitiomthe valve handle being in the position indicated as 14: on Fig. 1, one extremity of the port will register with i the port 9-while the ports 15 and 21 will be admitted only to the rotating motor.

out of register, fluid in this position beiilig n this position of the valve the ports and 24 will register allowing oil t9 be drawn from the oil chamber 22. i

In the third operating position shown in Figs. 11 and 12 and whiclrcorresponds to the position of the handle 14, indicated on Fig. 1 as 4 the valve is in such a position that the port 20. registers with the port 9 while the port 21 is fully opened to the port 15, pressure being thus admitted to both the rotating --motor and the hammer cylinder.

.In this position theport 24 registers with the port 25 and oil isadmitted to the supply chamber 18.

In operation, to start the hole the drill operator throws the valve handle to the first operating position this admitting fluid pres.- sure through the ports 20 and 15 into the drill alone so that the hammer piston strikes on the steel but the steel does not rotate. Under these conditions, a hole can be started easier than it the rotation was operating and the steel turning, since when turning it Idremoving a steel from a rotation and a slight piston blow are de' sirable'. Any degree of piston blow with full'rdtation can be'obtained by moving the valvehandle to positions intermediate of;

thesecond and third operating positions so that ports 21 and l5 only partly register andiitjhe flow of operative fluid to the hammer. cylinder is partly throttled. H hole it is often advantageous 'tohave the steel rotate Without any reciprocation of the hammer piston. This condition can be obtained by placing" the-valve in the second operating position with the valve handle in the position 12 By having the oil supply from the oil chamber cut off when the valve is in the non-operating position, Waste of the oilis chamber without disconnecting the pressure line from thedrill, as heretofore. It is to be understood that the pres'en specified modification of my invention and other forms and modifications are included 1n the spirit and scope of the invent on asexpressed in the clanns. 1

What I claim is: 1. a fluid operated hammer drill, having a cylinder and piston, a drill steel, and

an independent motor for rotating said drill steel, a'fluid inlet and a throttle. valve arranged to supply fluid from. said inletonly to said cylinder in one position, and only-to said'rotating motor in another position.-

.2. In a fluid operated hammer .drill', having a cylinder and piston, a drill 'steela-nd' an independent motor for rotating saiddrill steel, a fluid inlet and a throttlevalve ar' ranged to supply fluid from said inlet'only to said cylinder in one operating position and only to said rotating motor in anotheroperating position, and to out pit supplyfrom both hammer cylinder and rotating motor in a non-operating position.

3. In a fluid operated vhammer drill, havving a cylinder and piston, a drill steel, and

an independent motor-for rotating said drill steel, a fluid inlet and a throttle valve arranged to supply fluid from said inlet only to said cylinder in one operating position and only to said motor'in another operating position and to cut off the fluid supplyfrom'.

both the hammer cylinder and the rotating vmotor in a non-operating position; intermediate of said operating positions' i. In a fluid operated hammer drilL-havinfg a cylinder and piston, a drillsteel andan indie to a pendent motor for rotating'saiddrill steel.

a fluid inlet and a throttle valve arranged to supply-fluid from saidinletonly to said cylinder in one position, only tov said'rotating motor in another position, and-to both hammer cylinder and. rotating motor in a third POSllElfiIl.

5 In a fluid operated hammer,drill,;hav+ ing a cylinder and piston, a drill steeh'and an independent motor .for r-otatingsaid drill steel, a fluid inlet and a throttle. valve er-,1

ranged to supply fluid from said inlet only to' saidcylinder in-one operatingposition,

only to said rotating motorin another operatinjg position, to both hammer cyli-nderand' rotating motor in a'tliird operating position,

andto cutoff-the fluid supply to'both harnmer cylinder and rotating motor in a non-I operating position. g

6. In a fluid operated hammer drill, hav ing 'acylinder and-piston, a drill steel and an independent motor lor rotating said drill steel, a fluidfinlet' throttle valve arranged to supply fluid trom said inlet only to said cylinder. in one operatingposition, onlyto' 35 third operating positions.

said rotating motor in another operating position, to both said cylinder and said rotating motor ina third operating position, and to shut oil" the supply from both hammer cylinder and rotating motor in a nonoperating position intermediate of said first and second operating positions.

7. In a fluid operated hammer drill, having a cylinder and piston, a drill steel, and an independent motor for rotating said drill steel, a fluid inlet and a throttle valve arranged to supply fluid from said inlet only to said hammer cylinder in one position, only to said rotating motor in another posi tion, and to both said hammer cylinder and said rotating motor in a third position, intermediate positions between the second and third positions giving full supply to said rotating motor and variable supply to said hammer cylinder.

8. In a fluid operated hammer drill, having a cylinder and piston, a drill steel, and an independent motor for rotating said drill steel, a fluid inlet and a throttle valve arranged to supply fluid from said inlet only to said hammer cylinder in one operating position, only to said rotating motor in another operating position, to both said hammer cylinder and said rotating motor in a third operating position, to shutofl supply to both hammer cylinder and rotating motor in a non-operating position, and to give full supply to said rotating motor and a variable supplv to saidhammin positions intermediate of said second and 9. In a fluid openated hammer drill, having a cylinder and piston, a drill steel, and an independent motor for rotating said drill steel, a fluid inlet and-a throttle'valve'arranged to supply fluid from'said inlet only to said hammer cylinder in-oneoperating (position, only to said rotating motor in another operating position, to both said hammer cylinder and said rotating motor in a cylinder I third operating position, to give a full sup- I an independent motor for rotating said drill steel,'a fluid inlet, and a throttle valve havmg ports arranged to supply fluid from] said inlet only to said hammer cylinder in one position and to both said hammer cylinsition.

11. In a fluid operated hammer drill having a hammer cylinder'and piston, a drill steel and an independent motor for rotating said drill steel, a fluidv inlet, an-oil chamber and a throttle valve arranged to supply fluid from said'inlet to-operate said hammer cylinder and said rotating motor separately or ,simultaneousl and having a port to admit oil to said uid inlet from said oil chamber only during such operation.

12. In a fluid operated hammer drill having' a hammer cylinder and piston, a drill steel and an independent motor for operating said drill steel, a fluid inlet, an oil chamber and a throttle valve arranged to admit fluid to operate said hammer piston' and said rotating motor, and having a port arranged to admit oil to said hammer piston and r0- t'ating motor only during the operation thereof.

In testimony whereof, I have hereunto set my hand.

I ALBERT H. TAYLOR.

der and said rotating motor in another po- 

